Commit 3ad56045 authored by Vlad Zahorodnii's avatar Vlad Zahorodnii

[scenes/opengl] Cleanup cached decoration shadow textures when suspending compositing

Summary:
When suspending compositing, SceneOpenGLShadow cannot cleanup cached
decoration shadow textures because the effects handler is already gone.

This sometimes can result in a crash when running kwin_x11 --replace
(we're hitting an assert statement).

To fix that, let's use the scene instead of the effects handler for
making the OpenGL context current.

Test Plan:
No longer hit the assert statement:

    ASSERT: "m_cache.isEmpty()" in file /home/vlad/Workspace/KDE/src/kde/workspace/kwin/plugins/scenes/opengl/scene_opengl.cpp, line 2025
    Application::crashHandler() called with signal 6; recent crashes: 1
    QCoreApplication::applicationFilePath: Please instantiate the QApplication object first
    KCrash: crashing... crashRecursionCounter = 2
    KCrash: Application Name = kwin_x11 path = /home/vlad/Workspace/KDE/usr/bin pid = 5407
    KCrash: Arguments: /home/vlad/Workspace/KDE/usr/bin/kwin_x11 --replace

Reviewers: #kwin, graesslin

Reviewed By: #kwin, graesslin

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D17306
parent 64cf1afa
......@@ -2074,8 +2074,9 @@ SceneOpenGLShadow::SceneOpenGLShadow(Toplevel *toplevel)
SceneOpenGLShadow::~SceneOpenGLShadow()
{
if (effects) {
effects->makeOpenGLContextCurrent();
Scene *scene = Compositor::self()->scene();
if (scene) {
scene->makeOpenGLContextCurrent();
DecorationShadowTextureCache::instance().unregister(this);
m_texture.reset();
}
......@@ -2334,7 +2335,8 @@ bool SceneOpenGLShadow::prepareBackend()
{
if (hasDecorationShadow()) {
// simplifies a lot by going directly to
effects->makeOpenGLContextCurrent();
Scene *scene = Compositor::self()->scene();
scene->makeOpenGLContextCurrent();
m_texture = DecorationShadowTextureCache::instance().getTexture(this);
return true;
......@@ -2403,7 +2405,8 @@ bool SceneOpenGLShadow::prepareBackend()
}
}
effects->makeOpenGLContextCurrent();
Scene *scene = Compositor::self()->scene();
scene->makeOpenGLContextCurrent();
m_texture = QSharedPointer<GLTexture>::create(image);
if (m_texture->internalFormat() == GL_R8) {
......
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